I put a new battery unit in last year with a much heavier battery and that sits right about the area of the split, I call it a split as there is approx. a 1mm gap at the worst point and it feathers off to nothing, I don't think it's taking on water as the inside of the boat was dry but I think the boat has had glass work previously on the inside as there is no wood at all in the boat as one would expect, I have a feeling work was done before I bought the boat 6 years ago and it looks like they removed the flooring and re-glassed the whole inside of the boat, or at least where the flooring should be. It's hard to tell unless I tear out the carpet, but I say this as the carpet seems to show depressions where the strakes are.